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1. Natural Changes - Due to changes in earth’s atmosphere, some spontaneous changes occur like flood, earthquake etc.

2. Artificial changes refer to those changes which are man-made. For example global warming, ozone depletion, melting of glaciers etc.

3. Both natural and artificial changes disturb the balance between earth and human being.

4. Natural change such as soil formation takes thousands of years. Soil is formed by the breaking of rocks or minerals into smaller pieces which is known as weathering …

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